Lesson 10 — Counter (CTU)

Briefing

CTU (Count Up) increments on each rising edge of CU. When the count reaches the preset value PV, the Q output goes true. A CNT_RESET input clears the count back to zero. Used everywhere for batch counting — parts on a conveyor, boxes on a pallet.

Objectives

• BIN_FULL goes true after 10 PART_SENSOR pulses
• CNT_RESET clears the count and turns off BIN_FULL

I/O Table

Your program will be tested against:

All test cases run automatically when you submit. Assertions are hidden until you pass.

1. #110 pulses → BIN_FULL on

   10 rising edges on PART_SENSOR → BIN_FULL true

2. #2CNT_RESET clears count and BIN_FULL

   After BIN_FULL, pressing CNT_RESET clears everything